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Seconds hand stuck. Please help!

I have a grandfather clock that's been working fine for 3 yrs until today. I was winding the clock and I think I may have bumped something. The seconds hand will not move now- the other hands move fine if I push them, normal chime and strike. There are a few things I noticed:

-Sometimes when the pendulum swings the hand moves then stops.
-If I push in near the center of the clock the hand moves but when I take my hand away it stops.

From the above I thought it might be stuck on the clock face itself, so I tried pulling/pushing the hand but no luck. I am sure it just needs a minor adjustment but I'm not sure what. A minor bump shouldn't cause this much of a problem.

Check to see if the clock dial moved when you bumped it. The second hand is usually mounted directly to one of the wheel arbors. So if the minute and hour hands are moving correctly the second hand must be slipping on the arbor.

The seconds bit is just a friction fit, and can be pulled off with a little tug on the center. After you remove it, see if the other symptoms go away (they should). After you've verified that the problem is the seconds bit, put it back on so that it's near but not touching the dial. Also make sure its not rubbing the edges of it operating hole, and not touching either of the hands as they approach and pass the 12 position.

A.T., I think you're spot on.
I think this problem has nothing to do with hands but simply the clock is not running. The majority of seconds bits hands are attached directly to an elongated escape wheel pivot. The erratic motion of the hand he sees is the escape wheel failing to advance - ergo the hand doesn't advance.
This reads like a clock out of beat.